Add Shared Mailbox to Outlook for Windows

        1.Go to File in the top left corner


        2. Go to Account Settings and then Account Settings again


        3. Press Change on the email tab


        4. Go to More Settings


        5. Under the Advanced tab, press Add… and add the email address that you want added


        6.Press OK, if it worked the name of the mailbox should appear in that box

        7. On the Change Account screen, press next and then finish